2 * ether.c -- Ethernet gadget driver, with CDC and non-CDC options
4 * Copyright (C) 2003-2005 David Brownell
5 * Copyright (C) 2003-2004 Robert Schwebel, Benedikt Spranger
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 /* #define VERBOSE_DEBUG */
24 #include <linux/kernel.h>
25 #include <linux/utsname.h>
26 #include <linux/device.h>
27 #include <linux/ctype.h>
28 #include <linux/etherdevice.h>
29 #include <linux/ethtool.h>
31 #include <linux/usb/ch9.h>
32 #include <linux/usb/cdc.h>
33 #include <linux/usb/gadget.h>
35 #include "gadget_chips.h"
37 /*-------------------------------------------------------------------------*/
40 * Ethernet gadget driver -- with CDC and non-CDC options
41 * Builds on hardware support for a full duplex link.
43 * CDC Ethernet is the standard USB solution for sending Ethernet frames
44 * using USB. Real hardware tends to use the same framing protocol but look
45 * different for control features. This driver strongly prefers to use
46 * this USB-IF standard as its open-systems interoperability solution;
47 * most host side USB stacks (except from Microsoft) support it.
49 * There's some hardware that can't talk CDC. We make that hardware
50 * implement a "minimalist" vendor-agnostic CDC core: same framing, but
51 * link-level setup only requires activating the configuration. Only the
52 * endpoint descriptors, and product/vendor IDs, are relevant; no control
53 * operations are available. Linux supports it, but other host operating
54 * systems may not. (This is a subset of CDC Ethernet.)
56 * It turns out that if you add a few descriptors to that "CDC Subset",
57 * (Windows) host side drivers from MCCI can treat it as one submode of
58 * a proprietary scheme called "SAFE" ... without needing to know about
59 * specific product/vendor IDs. So we do that, making it easier to use
60 * those MS-Windows drivers. Those added descriptors make it resemble a
61 * CDC MDLM device, but they don't change device behavior at all. (See
62 * MCCI Engineering report 950198 "SAFE Networking Functions".)
64 * A third option is also in use. Rather than CDC Ethernet, or something
65 * simpler, Microsoft pushes their own approach: RNDIS. The published
66 * RNDIS specs are ambiguous and appear to be incomplete, and are also
70 #define DRIVER_DESC "Ethernet Gadget"
71 #define DRIVER_VERSION "May Day 2005"
73 static const char shortname [] = "ether";
74 static const char driver_desc [] = DRIVER_DESC;
76 #define RX_EXTRA 20 /* guard against rx overflows */
80 #ifndef CONFIG_USB_ETH_RNDIS
81 #define rndis_uninit(x) do{}while(0)
82 #define rndis_deregister(c) do{}while(0)
83 #define rndis_exit() do{}while(0)
86 /* CDC and RNDIS support the same host-chosen outgoing packet filters. */
87 #define DEFAULT_FILTER (USB_CDC_PACKET_TYPE_BROADCAST \
88 |USB_CDC_PACKET_TYPE_ALL_MULTICAST \
89 |USB_CDC_PACKET_TYPE_PROMISCUOUS \
90 |USB_CDC_PACKET_TYPE_DIRECTED)
93 /*-------------------------------------------------------------------------*/
97 struct usb_gadget *gadget;
98 struct usb_request *req; /* for control responses */
99 struct usb_request *stat_req; /* for cdc & rndis status */
102 struct usb_ep *in_ep, *out_ep, *status_ep;
103 const struct usb_endpoint_descriptor
107 struct list_head tx_reqs, rx_reqs;
109 struct net_device *net;
110 struct net_device_stats stats;
113 struct work_struct work;
117 unsigned suspended:1;
120 #define WORK_RX_MEMORY 0
122 u8 host_mac [ETH_ALEN];
125 /* This version autoconfigures as much as possible at run-time.
127 * It also ASSUMES a self-powered device, without remote wakeup,
128 * although remote wakeup support would make sense.
131 /*-------------------------------------------------------------------------*/
133 /* DO NOT REUSE THESE IDs with a protocol-incompatible driver!! Ever!!
134 * Instead: allocate your own, using normal USB-IF procedures.
137 /* Thanks to NetChip Technologies for donating this product ID.
138 * It's for devices with only CDC Ethernet configurations.
140 #define CDC_VENDOR_NUM 0x0525 /* NetChip */
141 #define CDC_PRODUCT_NUM 0xa4a1 /* Linux-USB Ethernet Gadget */
143 /* For hardware that can't talk CDC, we use the same vendor ID that
144 * ARM Linux has used for ethernet-over-usb, both with sa1100 and
145 * with pxa250. We're protocol-compatible, if the host-side drivers
146 * use the endpoint descriptors. bcdDevice (version) is nonzero, so
147 * drivers that need to hard-wire endpoint numbers have a hook.
149 * The protocol is a minimal subset of CDC Ether, which works on any bulk
150 * hardware that's not deeply broken ... even on hardware that can't talk
151 * RNDIS (like SA-1100, with no interrupt endpoint, or anything that
152 * doesn't handle control-OUT).
154 #define SIMPLE_VENDOR_NUM 0x049f
155 #define SIMPLE_PRODUCT_NUM 0x505a
157 /* For hardware that can talk RNDIS and either of the above protocols,
158 * use this ID ... the windows INF files will know it. Unless it's
159 * used with CDC Ethernet, Linux 2.4 hosts will need updates to choose
160 * the non-RNDIS configuration.
162 #define RNDIS_VENDOR_NUM 0x0525 /* NetChip */
163 #define RNDIS_PRODUCT_NUM 0xa4a2 /* Ethernet/RNDIS Gadget */
166 /* Some systems will want different product identifers published in the
167 * device descriptor, either numbers or strings or both. These string
168 * parameters are in UTF-8 (superset of ASCII's 7 bit characters).
171 static ushort idVendor;
172 module_param(idVendor, ushort, S_IRUGO);
173 MODULE_PARM_DESC(idVendor, "USB Vendor ID");
175 static ushort idProduct;
176 module_param(idProduct, ushort, S_IRUGO);
177 MODULE_PARM_DESC(idProduct, "USB Product ID");
179 static ushort bcdDevice;
180 module_param(bcdDevice, ushort, S_IRUGO);
181 MODULE_PARM_DESC(bcdDevice, "USB Device version (BCD)");
183 static char *iManufacturer;
184 module_param(iManufacturer, charp, S_IRUGO);
185 MODULE_PARM_DESC(iManufacturer, "USB Manufacturer string");
187 static char *iProduct;
188 module_param(iProduct, charp, S_IRUGO);
189 MODULE_PARM_DESC(iProduct, "USB Product string");
191 static char *iSerialNumber;
192 module_param(iSerialNumber, charp, S_IRUGO);
193 MODULE_PARM_DESC(iSerialNumber, "SerialNumber");
195 /* initial value, changed by "ifconfig usb0 hw ether xx:xx:xx:xx:xx:xx" */
196 static char *dev_addr;
197 module_param(dev_addr, charp, S_IRUGO);
198 MODULE_PARM_DESC(dev_addr, "Device Ethernet Address");
200 /* this address is invisible to ifconfig */
201 static char *host_addr;
202 module_param(host_addr, charp, S_IRUGO);
203 MODULE_PARM_DESC(host_addr, "Host Ethernet Address");
206 /*-------------------------------------------------------------------------*/
208 /* Include CDC support if we could run on CDC-capable hardware. */
210 #ifdef CONFIG_USB_GADGET_NET2280
211 #define DEV_CONFIG_CDC
214 #ifdef CONFIG_USB_GADGET_DUMMY_HCD
215 #define DEV_CONFIG_CDC
218 #ifdef CONFIG_USB_GADGET_GOKU
219 #define DEV_CONFIG_CDC
222 #ifdef CONFIG_USB_GADGET_LH7A40X
223 #define DEV_CONFIG_CDC
226 #ifdef CONFIG_USB_GADGET_MQ11XX
227 #define DEV_CONFIG_CDC
230 #ifdef CONFIG_USB_GADGET_OMAP
231 #define DEV_CONFIG_CDC
234 #ifdef CONFIG_USB_GADGET_N9604
235 #define DEV_CONFIG_CDC
238 #ifdef CONFIG_USB_GADGET_PXA27X
239 #define DEV_CONFIG_CDC
242 #ifdef CONFIG_USB_GADGET_S3C2410
243 #define DEV_CONFIG_CDC
246 #ifdef CONFIG_USB_GADGET_AT91
247 #define DEV_CONFIG_CDC
250 #ifdef CONFIG_USB_GADGET_MUSBHSFC
251 #define DEV_CONFIG_CDC
254 #ifdef CONFIG_USB_GADGET_MUSB_HDRC
255 #define DEV_CONFIG_CDC
258 #ifdef CONFIG_USB_GADGET_ATMEL_USBA
259 #define DEV_CONFIG_CDC
262 #ifdef CONFIG_USB_GADGET_FSL_USB2
263 #define DEV_CONFIG_CDC
266 /* For CDC-incapable hardware, choose the simple cdc subset.
267 * Anything that talks bulk (without notable bugs) can do this.
269 #ifdef CONFIG_USB_GADGET_PXA2XX
270 #define DEV_CONFIG_SUBSET
273 #ifdef CONFIG_USB_GADGET_SUPERH
274 #define DEV_CONFIG_SUBSET
277 #ifdef CONFIG_USB_GADGET_SA1100
278 /* use non-CDC for backwards compatibility */
279 #define DEV_CONFIG_SUBSET
282 #ifdef CONFIG_USB_GADGET_M66592
283 #define DEV_CONFIG_CDC
286 #ifdef CONFIG_USB_GADGET_AMD5536UDC
287 #define DEV_CONFIG_CDC
291 /*-------------------------------------------------------------------------*/
293 /* "main" config is either CDC, or its simple subset */
294 static inline int is_cdc(struct eth_dev *dev)
296 #if !defined(DEV_CONFIG_SUBSET)
297 return 1; /* only cdc possible */
298 #elif !defined (DEV_CONFIG_CDC)
299 return 0; /* only subset possible */
301 return dev->cdc; /* depends on what hardware we found */
305 /* "secondary" RNDIS config may sometimes be activated */
306 static inline int rndis_active(struct eth_dev *dev)
308 #ifdef CONFIG_USB_ETH_RNDIS
315 #define subset_active(dev) (!is_cdc(dev) && !rndis_active(dev))
316 #define cdc_active(dev) ( is_cdc(dev) && !rndis_active(dev))
320 #define DEFAULT_QLEN 2 /* double buffering by default */
322 /* peak bulk transfer bits-per-second */
323 #define HS_BPS (13 * 512 * 8 * 1000 * 8)
324 #define FS_BPS (19 * 64 * 1 * 1000 * 8)
326 #ifdef CONFIG_USB_GADGET_DUALSPEED
327 #define DEVSPEED USB_SPEED_HIGH
329 static unsigned qmult = 5;
330 module_param (qmult, uint, S_IRUGO|S_IWUSR);
333 /* for dual-speed hardware, use deeper queues at highspeed */
334 #define qlen(gadget) \
335 (DEFAULT_QLEN*((gadget->speed == USB_SPEED_HIGH) ? qmult : 1))
337 static inline int BITRATE(struct usb_gadget *g)
339 return (g->speed == USB_SPEED_HIGH) ? HS_BPS : FS_BPS;
342 #else /* full speed (low speed doesn't do bulk) */
346 #define DEVSPEED USB_SPEED_FULL
348 #define qlen(gadget) DEFAULT_QLEN
350 static inline int BITRATE(struct usb_gadget *g)
357 /*-------------------------------------------------------------------------*/
359 #define xprintk(d,level,fmt,args...) \
360 printk(level "%s: " fmt , (d)->net->name , ## args)
364 #define DEBUG(dev,fmt,args...) \
365 xprintk(dev , KERN_DEBUG , fmt , ## args)
367 #define DEBUG(dev,fmt,args...) \
374 #define VDEBUG(dev,fmt,args...) \
378 #define ERROR(dev,fmt,args...) \
379 xprintk(dev , KERN_ERR , fmt , ## args)
380 #define WARN(dev,fmt,args...) \
381 xprintk(dev , KERN_WARNING , fmt , ## args)
382 #define INFO(dev,fmt,args...) \
383 xprintk(dev , KERN_INFO , fmt , ## args)
385 /*-------------------------------------------------------------------------*/
387 /* USB DRIVER HOOKUP (to the hardware driver, below us), mostly
388 * ep0 implementation: descriptors, config management, setup().
389 * also optional class-specific notification interrupt transfer.
393 * DESCRIPTORS ... most are static, but strings and (full) configuration
394 * descriptors are built on demand. For now we do either full CDC, or
395 * our simple subset, with RNDIS as an optional second configuration.
397 * RNDIS includes some CDC ACM descriptors ... like CDC Ethernet. But
398 * the class descriptors match a modem (they're ignored; it's really just
399 * Ethernet functionality), they don't need the NOP altsetting, and the
400 * status transfer endpoint isn't optional.
403 #define STRING_MANUFACTURER 1
404 #define STRING_PRODUCT 2
405 #define STRING_ETHADDR 3
406 #define STRING_DATA 4
407 #define STRING_CONTROL 5
408 #define STRING_RNDIS_CONTROL 6
410 #define STRING_SUBSET 8
411 #define STRING_RNDIS 9
412 #define STRING_SERIALNUMBER 10
414 /* holds our biggest descriptor (or RNDIS response) */
415 #define USB_BUFSIZ 256
418 * This device advertises one configuration, eth_config, unless RNDIS
419 * is enabled (rndis_config) on hardware supporting at least two configs.
421 * NOTE: Controllers like superh_udc should probably be able to use
422 * an RNDIS-only configuration.
424 * FIXME define some higher-powered configurations to make it easier
425 * to recharge batteries ...
428 #define DEV_CONFIG_VALUE 1 /* cdc or subset */
429 #define DEV_RNDIS_CONFIG_VALUE 2 /* rndis; optional */
431 static struct usb_device_descriptor
433 .bLength = sizeof device_desc,
434 .bDescriptorType = USB_DT_DEVICE,
436 .bcdUSB = __constant_cpu_to_le16 (0x0200),
438 .bDeviceClass = USB_CLASS_COMM,
439 .bDeviceSubClass = 0,
440 .bDeviceProtocol = 0,
442 .idVendor = __constant_cpu_to_le16 (CDC_VENDOR_NUM),
443 .idProduct = __constant_cpu_to_le16 (CDC_PRODUCT_NUM),
444 .iManufacturer = STRING_MANUFACTURER,
445 .iProduct = STRING_PRODUCT,
446 .bNumConfigurations = 1,
449 static struct usb_otg_descriptor
451 .bLength = sizeof otg_descriptor,
452 .bDescriptorType = USB_DT_OTG,
454 .bmAttributes = USB_OTG_SRP,
457 static struct usb_config_descriptor
459 .bLength = sizeof eth_config,
460 .bDescriptorType = USB_DT_CONFIG,
462 /* compute wTotalLength on the fly */
464 .bConfigurationValue = DEV_CONFIG_VALUE,
465 .iConfiguration = STRING_CDC,
466 .bmAttributes = USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER,
470 #ifdef CONFIG_USB_ETH_RNDIS
471 static struct usb_config_descriptor
473 .bLength = sizeof rndis_config,
474 .bDescriptorType = USB_DT_CONFIG,
476 /* compute wTotalLength on the fly */
478 .bConfigurationValue = DEV_RNDIS_CONFIG_VALUE,
479 .iConfiguration = STRING_RNDIS,
480 .bmAttributes = USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER,
486 * Compared to the simple CDC subset, the full CDC Ethernet model adds
487 * three class descriptors, two interface descriptors, optional status
488 * endpoint. Both have a "data" interface and two bulk endpoints.
489 * There are also differences in how control requests are handled.
491 * RNDIS shares a lot with CDC-Ethernet, since it's a variant of the
492 * CDC-ACM (modem) spec. Unfortunately MSFT's RNDIS driver is buggy; it
493 * may hang or oops. Since bugfixes (or accurate specs, letting Linux
494 * work around those bugs) are unlikely to ever come from MSFT, you may
495 * wish to avoid using RNDIS.
497 * MCCI offers an alternative to RNDIS if you need to connect to Windows
498 * but have hardware that can't support CDC Ethernet. We add descriptors
499 * to present the CDC Subset as a (nonconformant) CDC MDLM variant called
500 * "SAFE". That borrows from both CDC Ethernet and CDC MDLM. You can
501 * get those drivers from MCCI, or bundled with various products.
504 #ifdef DEV_CONFIG_CDC
505 static struct usb_interface_descriptor
507 .bLength = sizeof control_intf,
508 .bDescriptorType = USB_DT_INTERFACE,
510 .bInterfaceNumber = 0,
511 /* status endpoint is optional; this may be patched later */
513 .bInterfaceClass = USB_CLASS_COMM,
514 .bInterfaceSubClass = USB_CDC_SUBCLASS_ETHERNET,
515 .bInterfaceProtocol = USB_CDC_PROTO_NONE,
516 .iInterface = STRING_CONTROL,
520 #ifdef CONFIG_USB_ETH_RNDIS
521 static const struct usb_interface_descriptor
522 rndis_control_intf = {
523 .bLength = sizeof rndis_control_intf,
524 .bDescriptorType = USB_DT_INTERFACE,
526 .bInterfaceNumber = 0,
528 .bInterfaceClass = USB_CLASS_COMM,
529 .bInterfaceSubClass = USB_CDC_SUBCLASS_ACM,
530 .bInterfaceProtocol = USB_CDC_ACM_PROTO_VENDOR,
531 .iInterface = STRING_RNDIS_CONTROL,
535 static const struct usb_cdc_header_desc header_desc = {
536 .bLength = sizeof header_desc,
537 .bDescriptorType = USB_DT_CS_INTERFACE,
538 .bDescriptorSubType = USB_CDC_HEADER_TYPE,
540 .bcdCDC = __constant_cpu_to_le16 (0x0110),
543 #if defined(DEV_CONFIG_CDC) || defined(CONFIG_USB_ETH_RNDIS)
545 static const struct usb_cdc_union_desc union_desc = {
546 .bLength = sizeof union_desc,
547 .bDescriptorType = USB_DT_CS_INTERFACE,
548 .bDescriptorSubType = USB_CDC_UNION_TYPE,
550 .bMasterInterface0 = 0, /* index of control interface */
551 .bSlaveInterface0 = 1, /* index of DATA interface */
554 #endif /* CDC || RNDIS */
556 #ifdef CONFIG_USB_ETH_RNDIS
558 static const struct usb_cdc_call_mgmt_descriptor call_mgmt_descriptor = {
559 .bLength = sizeof call_mgmt_descriptor,
560 .bDescriptorType = USB_DT_CS_INTERFACE,
561 .bDescriptorSubType = USB_CDC_CALL_MANAGEMENT_TYPE,
563 .bmCapabilities = 0x00,
564 .bDataInterface = 0x01,
567 static const struct usb_cdc_acm_descriptor acm_descriptor = {
568 .bLength = sizeof acm_descriptor,
569 .bDescriptorType = USB_DT_CS_INTERFACE,
570 .bDescriptorSubType = USB_CDC_ACM_TYPE,
572 .bmCapabilities = 0x00,
577 #ifndef DEV_CONFIG_CDC
579 /* "SAFE" loosely follows CDC WMC MDLM, violating the spec in various
580 * ways: data endpoints live in the control interface, there's no data
581 * interface, and it's not used to talk to a cell phone radio.
584 static const struct usb_cdc_mdlm_desc mdlm_desc = {
585 .bLength = sizeof mdlm_desc,
586 .bDescriptorType = USB_DT_CS_INTERFACE,
587 .bDescriptorSubType = USB_CDC_MDLM_TYPE,
589 .bcdVersion = __constant_cpu_to_le16(0x0100),
591 0x5d, 0x34, 0xcf, 0x66, 0x11, 0x18, 0x11, 0xd6,
592 0xa2, 0x1a, 0x00, 0x01, 0x02, 0xca, 0x9a, 0x7f,
596 /* since "usb_cdc_mdlm_detail_desc" is a variable length structure, we
597 * can't really use its struct. All we do here is say that we're using
598 * the submode of "SAFE" which directly matches the CDC Subset.
600 static const u8 mdlm_detail_desc[] = {
603 USB_CDC_MDLM_DETAIL_TYPE,
606 0, /* network control capabilities (none) */
607 0, /* network data capabilities ("raw" encapsulation) */
612 static const struct usb_cdc_ether_desc ether_desc = {
613 .bLength = sizeof ether_desc,
614 .bDescriptorType = USB_DT_CS_INTERFACE,
615 .bDescriptorSubType = USB_CDC_ETHERNET_TYPE,
617 /* this descriptor actually adds value, surprise! */
618 .iMACAddress = STRING_ETHADDR,
619 .bmEthernetStatistics = __constant_cpu_to_le32 (0), /* no statistics */
620 .wMaxSegmentSize = __constant_cpu_to_le16 (ETH_FRAME_LEN),
621 .wNumberMCFilters = __constant_cpu_to_le16 (0),
622 .bNumberPowerFilters = 0,
626 #if defined(DEV_CONFIG_CDC) || defined(CONFIG_USB_ETH_RNDIS)
628 /* include the status endpoint if we can, even where it's optional.
629 * use wMaxPacketSize big enough to fit CDC_NOTIFY_SPEED_CHANGE in one
630 * packet, to simplify cancellation; and a big transfer interval, to
631 * waste less bandwidth.
633 * some drivers (like Linux 2.4 cdc-ether!) "need" it to exist even
634 * if they ignore the connect/disconnect notifications that real aether
635 * can provide. more advanced cdc configurations might want to support
636 * encapsulated commands (vendor-specific, using control-OUT).
638 * RNDIS requires the status endpoint, since it uses that encapsulation
639 * mechanism for its funky RPC scheme.
642 #define LOG2_STATUS_INTERVAL_MSEC 5 /* 1 << 5 == 32 msec */
643 #define STATUS_BYTECOUNT 16 /* 8 byte header + data */
645 static struct usb_endpoint_descriptor
647 .bLength = USB_DT_ENDPOINT_SIZE,
648 .bDescriptorType = USB_DT_ENDPOINT,
650 .bEndpointAddress = USB_DIR_IN,
651 .bmAttributes = USB_ENDPOINT_XFER_INT,
652 .wMaxPacketSize = __constant_cpu_to_le16 (STATUS_BYTECOUNT),
653 .bInterval = 1 << LOG2_STATUS_INTERVAL_MSEC,
657 #ifdef DEV_CONFIG_CDC
659 /* the default data interface has no endpoints ... */
661 static const struct usb_interface_descriptor
663 .bLength = sizeof data_nop_intf,
664 .bDescriptorType = USB_DT_INTERFACE,
666 .bInterfaceNumber = 1,
667 .bAlternateSetting = 0,
669 .bInterfaceClass = USB_CLASS_CDC_DATA,
670 .bInterfaceSubClass = 0,
671 .bInterfaceProtocol = 0,
674 /* ... but the "real" data interface has two bulk endpoints */
676 static const struct usb_interface_descriptor
678 .bLength = sizeof data_intf,
679 .bDescriptorType = USB_DT_INTERFACE,
681 .bInterfaceNumber = 1,
682 .bAlternateSetting = 1,
684 .bInterfaceClass = USB_CLASS_CDC_DATA,
685 .bInterfaceSubClass = 0,
686 .bInterfaceProtocol = 0,
687 .iInterface = STRING_DATA,
692 #ifdef CONFIG_USB_ETH_RNDIS
694 /* RNDIS doesn't activate by changing to the "real" altsetting */
696 static const struct usb_interface_descriptor
698 .bLength = sizeof rndis_data_intf,
699 .bDescriptorType = USB_DT_INTERFACE,
701 .bInterfaceNumber = 1,
702 .bAlternateSetting = 0,
704 .bInterfaceClass = USB_CLASS_CDC_DATA,
705 .bInterfaceSubClass = 0,
706 .bInterfaceProtocol = 0,
707 .iInterface = STRING_DATA,
712 #ifdef DEV_CONFIG_SUBSET
715 * "Simple" CDC-subset option is a simple vendor-neutral model that most
716 * full speed controllers can handle: one interface, two bulk endpoints.
718 * To assist host side drivers, we fancy it up a bit, and add descriptors
719 * so some host side drivers will understand it as a "SAFE" variant.
722 static const struct usb_interface_descriptor
724 .bLength = sizeof subset_data_intf,
725 .bDescriptorType = USB_DT_INTERFACE,
727 .bInterfaceNumber = 0,
728 .bAlternateSetting = 0,
730 .bInterfaceClass = USB_CLASS_COMM,
731 .bInterfaceSubClass = USB_CDC_SUBCLASS_MDLM,
732 .bInterfaceProtocol = 0,
733 .iInterface = STRING_DATA,
739 static struct usb_endpoint_descriptor
741 .bLength = USB_DT_ENDPOINT_SIZE,
742 .bDescriptorType = USB_DT_ENDPOINT,
744 .bEndpointAddress = USB_DIR_IN,
745 .bmAttributes = USB_ENDPOINT_XFER_BULK,
748 static struct usb_endpoint_descriptor
750 .bLength = USB_DT_ENDPOINT_SIZE,
751 .bDescriptorType = USB_DT_ENDPOINT,
753 .bEndpointAddress = USB_DIR_OUT,
754 .bmAttributes = USB_ENDPOINT_XFER_BULK,
757 static const struct usb_descriptor_header *fs_eth_function [11] = {
758 (struct usb_descriptor_header *) &otg_descriptor,
759 #ifdef DEV_CONFIG_CDC
760 /* "cdc" mode descriptors */
761 (struct usb_descriptor_header *) &control_intf,
762 (struct usb_descriptor_header *) &header_desc,
763 (struct usb_descriptor_header *) &union_desc,
764 (struct usb_descriptor_header *) ðer_desc,
765 /* NOTE: status endpoint may need to be removed */
766 (struct usb_descriptor_header *) &fs_status_desc,
767 /* data interface, with altsetting */
768 (struct usb_descriptor_header *) &data_nop_intf,
769 (struct usb_descriptor_header *) &data_intf,
770 (struct usb_descriptor_header *) &fs_source_desc,
771 (struct usb_descriptor_header *) &fs_sink_desc,
773 #endif /* DEV_CONFIG_CDC */
776 static inline void __init fs_subset_descriptors(void)
778 #ifdef DEV_CONFIG_SUBSET
779 /* behavior is "CDC Subset"; extra descriptors say "SAFE" */
780 fs_eth_function[1] = (struct usb_descriptor_header *) &subset_data_intf;
781 fs_eth_function[2] = (struct usb_descriptor_header *) &header_desc;
782 fs_eth_function[3] = (struct usb_descriptor_header *) &mdlm_desc;
783 fs_eth_function[4] = (struct usb_descriptor_header *) &mdlm_detail_desc;
784 fs_eth_function[5] = (struct usb_descriptor_header *) ðer_desc;
785 fs_eth_function[6] = (struct usb_descriptor_header *) &fs_source_desc;
786 fs_eth_function[7] = (struct usb_descriptor_header *) &fs_sink_desc;
787 fs_eth_function[8] = NULL;
789 fs_eth_function[1] = NULL;
793 #ifdef CONFIG_USB_ETH_RNDIS
794 static const struct usb_descriptor_header *fs_rndis_function [] = {
795 (struct usb_descriptor_header *) &otg_descriptor,
796 /* control interface matches ACM, not Ethernet */
797 (struct usb_descriptor_header *) &rndis_control_intf,
798 (struct usb_descriptor_header *) &header_desc,
799 (struct usb_descriptor_header *) &call_mgmt_descriptor,
800 (struct usb_descriptor_header *) &acm_descriptor,
801 (struct usb_descriptor_header *) &union_desc,
802 (struct usb_descriptor_header *) &fs_status_desc,
803 /* data interface has no altsetting */
804 (struct usb_descriptor_header *) &rndis_data_intf,
805 (struct usb_descriptor_header *) &fs_source_desc,
806 (struct usb_descriptor_header *) &fs_sink_desc,
812 * usb 2.0 devices need to expose both high speed and full speed
813 * descriptors, unless they only run at full speed.
816 #if defined(DEV_CONFIG_CDC) || defined(CONFIG_USB_ETH_RNDIS)
817 static struct usb_endpoint_descriptor
819 .bLength = USB_DT_ENDPOINT_SIZE,
820 .bDescriptorType = USB_DT_ENDPOINT,
822 .bmAttributes = USB_ENDPOINT_XFER_INT,
823 .wMaxPacketSize = __constant_cpu_to_le16 (STATUS_BYTECOUNT),
824 .bInterval = LOG2_STATUS_INTERVAL_MSEC + 4,
826 #endif /* DEV_CONFIG_CDC */
828 static struct usb_endpoint_descriptor
830 .bLength = USB_DT_ENDPOINT_SIZE,
831 .bDescriptorType = USB_DT_ENDPOINT,
833 .bmAttributes = USB_ENDPOINT_XFER_BULK,
834 .wMaxPacketSize = __constant_cpu_to_le16 (512),
837 static struct usb_endpoint_descriptor
839 .bLength = USB_DT_ENDPOINT_SIZE,
840 .bDescriptorType = USB_DT_ENDPOINT,
842 .bmAttributes = USB_ENDPOINT_XFER_BULK,
843 .wMaxPacketSize = __constant_cpu_to_le16 (512),
846 static struct usb_qualifier_descriptor
848 .bLength = sizeof dev_qualifier,
849 .bDescriptorType = USB_DT_DEVICE_QUALIFIER,
851 .bcdUSB = __constant_cpu_to_le16 (0x0200),
852 .bDeviceClass = USB_CLASS_COMM,
854 .bNumConfigurations = 1,
857 static const struct usb_descriptor_header *hs_eth_function [11] = {
858 (struct usb_descriptor_header *) &otg_descriptor,
859 #ifdef DEV_CONFIG_CDC
860 /* "cdc" mode descriptors */
861 (struct usb_descriptor_header *) &control_intf,
862 (struct usb_descriptor_header *) &header_desc,
863 (struct usb_descriptor_header *) &union_desc,
864 (struct usb_descriptor_header *) ðer_desc,
865 /* NOTE: status endpoint may need to be removed */
866 (struct usb_descriptor_header *) &hs_status_desc,
867 /* data interface, with altsetting */
868 (struct usb_descriptor_header *) &data_nop_intf,
869 (struct usb_descriptor_header *) &data_intf,
870 (struct usb_descriptor_header *) &hs_source_desc,
871 (struct usb_descriptor_header *) &hs_sink_desc,
873 #endif /* DEV_CONFIG_CDC */
876 static inline void __init hs_subset_descriptors(void)
878 #ifdef DEV_CONFIG_SUBSET
879 /* behavior is "CDC Subset"; extra descriptors say "SAFE" */
880 hs_eth_function[1] = (struct usb_descriptor_header *) &subset_data_intf;
881 hs_eth_function[2] = (struct usb_descriptor_header *) &header_desc;
882 hs_eth_function[3] = (struct usb_descriptor_header *) &mdlm_desc;
883 hs_eth_function[4] = (struct usb_descriptor_header *) &mdlm_detail_desc;
884 hs_eth_function[5] = (struct usb_descriptor_header *) ðer_desc;
885 hs_eth_function[6] = (struct usb_descriptor_header *) &hs_source_desc;
886 hs_eth_function[7] = (struct usb_descriptor_header *) &hs_sink_desc;
887 hs_eth_function[8] = NULL;
889 hs_eth_function[1] = NULL;
893 #ifdef CONFIG_USB_ETH_RNDIS
894 static const struct usb_descriptor_header *hs_rndis_function [] = {
895 (struct usb_descriptor_header *) &otg_descriptor,
896 /* control interface matches ACM, not Ethernet */
897 (struct usb_descriptor_header *) &rndis_control_intf,
898 (struct usb_descriptor_header *) &header_desc,
899 (struct usb_descriptor_header *) &call_mgmt_descriptor,
900 (struct usb_descriptor_header *) &acm_descriptor,
901 (struct usb_descriptor_header *) &union_desc,
902 (struct usb_descriptor_header *) &hs_status_desc,
903 /* data interface has no altsetting */
904 (struct usb_descriptor_header *) &rndis_data_intf,
905 (struct usb_descriptor_header *) &hs_source_desc,
906 (struct usb_descriptor_header *) &hs_sink_desc,
912 /* maxpacket and other transfer characteristics vary by speed. */
913 static inline struct usb_endpoint_descriptor *
914 ep_desc(struct usb_gadget *g, struct usb_endpoint_descriptor *hs,
915 struct usb_endpoint_descriptor *fs)
917 if (gadget_is_dualspeed(g) && g->speed == USB_SPEED_HIGH)
923 /*-------------------------------------------------------------------------*/
925 /* descriptors that are built on-demand */
927 static char manufacturer [50];
928 static char product_desc [40] = DRIVER_DESC;
929 static char serial_number [20];
931 /* address that the host will use ... usually assigned at random */
932 static char ethaddr [2 * ETH_ALEN + 1];
934 /* static strings, in UTF-8 */
935 static struct usb_string strings [] = {
936 { STRING_MANUFACTURER, manufacturer, },
937 { STRING_PRODUCT, product_desc, },
938 { STRING_SERIALNUMBER, serial_number, },
939 { STRING_DATA, "Ethernet Data", },
940 { STRING_ETHADDR, ethaddr, },
941 #ifdef DEV_CONFIG_CDC
942 { STRING_CDC, "CDC Ethernet", },
943 { STRING_CONTROL, "CDC Communications Control", },
945 #ifdef DEV_CONFIG_SUBSET
946 { STRING_SUBSET, "CDC Ethernet Subset", },
948 #ifdef CONFIG_USB_ETH_RNDIS
949 { STRING_RNDIS, "RNDIS", },
950 { STRING_RNDIS_CONTROL, "RNDIS Communications Control", },
952 { } /* end of list */
955 static struct usb_gadget_strings stringtab = {
956 .language = 0x0409, /* en-us */
961 * one config, two interfaces: control, data.
962 * complications: class descriptors, and an altsetting.
965 config_buf(struct usb_gadget *g, u8 *buf, u8 type, unsigned index, int is_otg)
968 const struct usb_config_descriptor *config;
969 const struct usb_descriptor_header **function;
972 if (gadget_is_dualspeed(g)) {
973 hs = (g->speed == USB_SPEED_HIGH);
974 if (type == USB_DT_OTHER_SPEED_CONFIG)
977 #define which_fn(t) (hs ? hs_ ## t ## _function : fs_ ## t ## _function)
979 if (index >= device_desc.bNumConfigurations)
982 #ifdef CONFIG_USB_ETH_RNDIS
983 /* list the RNDIS config first, to make Microsoft's drivers
984 * happy. DOCSIS 1.0 needs this too.
986 if (device_desc.bNumConfigurations == 2 && index == 0) {
987 config = &rndis_config;
988 function = which_fn (rndis);
992 config = ð_config;
993 function = which_fn (eth);
996 /* for now, don't advertise srp-only devices */
1000 len = usb_gadget_config_buf (config, buf, USB_BUFSIZ, function);
1003 ((struct usb_config_descriptor *) buf)->bDescriptorType = type;
1007 /*-------------------------------------------------------------------------*/
1009 static void eth_start (struct eth_dev *dev, gfp_t gfp_flags);
1010 static int alloc_requests (struct eth_dev *dev, unsigned n, gfp_t gfp_flags);
1013 set_ether_config (struct eth_dev *dev, gfp_t gfp_flags)
1016 struct usb_gadget *gadget = dev->gadget;
1018 #if defined(DEV_CONFIG_CDC) || defined(CONFIG_USB_ETH_RNDIS)
1019 /* status endpoint used for RNDIS and (optionally) CDC */
1020 if (!subset_active(dev) && dev->status_ep) {
1021 dev->status = ep_desc (gadget, &hs_status_desc,
1023 dev->status_ep->driver_data = dev;
1025 result = usb_ep_enable (dev->status_ep, dev->status);
1027 DEBUG (dev, "enable %s --> %d\n",
1028 dev->status_ep->name, result);
1034 dev->in = ep_desc(gadget, &hs_source_desc, &fs_source_desc);
1035 dev->in_ep->driver_data = dev;
1037 dev->out = ep_desc(gadget, &hs_sink_desc, &fs_sink_desc);
1038 dev->out_ep->driver_data = dev;
1040 /* With CDC, the host isn't allowed to use these two data
1041 * endpoints in the default altsetting for the interface.
1042 * so we don't activate them yet. Reset from SET_INTERFACE.
1044 * Strictly speaking RNDIS should work the same: activation is
1045 * a side effect of setting a packet filter. Deactivation is
1046 * from REMOTE_NDIS_HALT_MSG, reset from REMOTE_NDIS_RESET_MSG.
1048 if (!cdc_active(dev)) {
1049 result = usb_ep_enable (dev->in_ep, dev->in);
1051 DEBUG(dev, "enable %s --> %d\n",
1052 dev->in_ep->name, result);
1056 result = usb_ep_enable (dev->out_ep, dev->out);
1058 DEBUG (dev, "enable %s --> %d\n",
1059 dev->out_ep->name, result);
1066 result = alloc_requests (dev, qlen (gadget), gfp_flags);
1068 /* on error, disable any endpoints */
1070 if (!subset_active(dev))
1071 (void) usb_ep_disable (dev->status_ep);
1073 (void) usb_ep_disable (dev->in_ep);
1074 (void) usb_ep_disable (dev->out_ep);
1079 /* activate non-CDC configs right away
1080 * this isn't strictly according to the RNDIS spec
1082 if (!cdc_active (dev)) {
1083 netif_carrier_on (dev->net);
1084 if (netif_running (dev->net)) {
1085 spin_unlock (&dev->lock);
1086 eth_start (dev, GFP_ATOMIC);
1087 spin_lock (&dev->lock);
1092 DEBUG (dev, "qlen %d\n", qlen (gadget));
1094 /* caller is responsible for cleanup on error */
1098 static void eth_reset_config (struct eth_dev *dev)
1100 struct usb_request *req;
1102 if (dev->config == 0)
1105 DEBUG (dev, "%s\n", __FUNCTION__);
1107 netif_stop_queue (dev->net);
1108 netif_carrier_off (dev->net);
1109 rndis_uninit(dev->rndis_config);
1111 /* disable endpoints, forcing (synchronous) completion of
1112 * pending i/o. then free the requests.
1115 usb_ep_disable (dev->in_ep);
1116 spin_lock(&dev->req_lock);
1117 while (likely (!list_empty (&dev->tx_reqs))) {
1118 req = container_of (dev->tx_reqs.next,
1119 struct usb_request, list);
1120 list_del (&req->list);
1122 spin_unlock(&dev->req_lock);
1123 usb_ep_free_request (dev->in_ep, req);
1124 spin_lock(&dev->req_lock);
1126 spin_unlock(&dev->req_lock);
1129 usb_ep_disable (dev->out_ep);
1130 spin_lock(&dev->req_lock);
1131 while (likely (!list_empty (&dev->rx_reqs))) {
1132 req = container_of (dev->rx_reqs.next,
1133 struct usb_request, list);
1134 list_del (&req->list);
1136 spin_unlock(&dev->req_lock);
1137 usb_ep_free_request (dev->out_ep, req);
1138 spin_lock(&dev->req_lock);
1140 spin_unlock(&dev->req_lock);
1144 usb_ep_disable (dev->status_ep);
1147 dev->cdc_filter = 0;
1151 /* change our operational config. must agree with the code
1152 * that returns config descriptors, and altsetting code.
1155 eth_set_config (struct eth_dev *dev, unsigned number, gfp_t gfp_flags)
1158 struct usb_gadget *gadget = dev->gadget;
1160 if (gadget_is_sa1100 (gadget)
1162 && atomic_read (&dev->tx_qlen) != 0) {
1163 /* tx fifo is full, but we can't clear it...*/
1164 INFO (dev, "can't change configurations\n");
1167 eth_reset_config (dev);
1170 case DEV_CONFIG_VALUE:
1171 result = set_ether_config (dev, gfp_flags);
1173 #ifdef CONFIG_USB_ETH_RNDIS
1174 case DEV_RNDIS_CONFIG_VALUE:
1176 result = set_ether_config (dev, gfp_flags);
1188 eth_reset_config (dev);
1189 usb_gadget_vbus_draw(dev->gadget,
1190 gadget_is_otg(dev->gadget) ? 8 : 100);
1195 power = 2 * eth_config.bMaxPower;
1196 usb_gadget_vbus_draw(dev->gadget, power);
1198 switch (gadget->speed) {
1199 case USB_SPEED_FULL: speed = "full"; break;
1200 #ifdef CONFIG_USB_GADGET_DUALSPEED
1201 case USB_SPEED_HIGH: speed = "high"; break;
1203 default: speed = "?"; break;
1206 dev->config = number;
1207 INFO (dev, "%s speed config #%d: %d mA, %s, using %s\n",
1208 speed, number, power, driver_desc,
1213 : "CDC Ethernet Subset"));
1218 /*-------------------------------------------------------------------------*/
1220 #ifdef DEV_CONFIG_CDC
1222 /* The interrupt endpoint is used in CDC networking models (Ethernet, ATM)
1223 * only to notify the host about link status changes (which we support) or
1224 * report completion of some encapsulated command (as used in RNDIS). Since
1225 * we want this CDC Ethernet code to be vendor-neutral, we don't use that
1226 * command mechanism; and only one status request is ever queued.
1229 static void eth_status_complete (struct usb_ep *ep, struct usb_request *req)
1231 struct usb_cdc_notification *event = req->buf;
1232 int value = req->status;
1233 struct eth_dev *dev = ep->driver_data;
1235 /* issue the second notification if host reads the first */
1236 if (event->bNotificationType == USB_CDC_NOTIFY_NETWORK_CONNECTION
1238 __le32 *data = req->buf + sizeof *event;
1240 event->bmRequestType = 0xA1;
1241 event->bNotificationType = USB_CDC_NOTIFY_SPEED_CHANGE;
1242 event->wValue = __constant_cpu_to_le16 (0);
1243 event->wIndex = __constant_cpu_to_le16 (1);
1244 event->wLength = __constant_cpu_to_le16 (8);
1246 /* SPEED_CHANGE data is up/down speeds in bits/sec */
1247 data [0] = data [1] = cpu_to_le32 (BITRATE (dev->gadget));
1249 req->length = STATUS_BYTECOUNT;
1250 value = usb_ep_queue (ep, req, GFP_ATOMIC);
1251 DEBUG (dev, "send SPEED_CHANGE --> %d\n", value);
1254 } else if (value != -ECONNRESET)
1255 DEBUG (dev, "event %02x --> %d\n",
1256 event->bNotificationType, value);
1257 req->context = NULL;
1260 static void issue_start_status (struct eth_dev *dev)
1262 struct usb_request *req = dev->stat_req;
1263 struct usb_cdc_notification *event;
1266 DEBUG (dev, "%s, flush old status first\n", __FUNCTION__);
1270 * FIXME ugly idiom, maybe we'd be better with just
1271 * a "cancel the whole queue" primitive since any
1272 * unlink-one primitive has way too many error modes.
1273 * here, we "know" toggle is already clear...
1275 * FIXME iff req->context != null just dequeue it
1277 usb_ep_disable (dev->status_ep);
1278 usb_ep_enable (dev->status_ep, dev->status);
1280 /* 3.8.1 says to issue first NETWORK_CONNECTION, then
1281 * a SPEED_CHANGE. could be useful in some configs.
1284 event->bmRequestType = 0xA1;
1285 event->bNotificationType = USB_CDC_NOTIFY_NETWORK_CONNECTION;
1286 event->wValue = __constant_cpu_to_le16 (1); /* connected */
1287 event->wIndex = __constant_cpu_to_le16 (1);
1290 req->length = sizeof *event;
1291 req->complete = eth_status_complete;
1294 value = usb_ep_queue (dev->status_ep, req, GFP_ATOMIC);
1296 DEBUG (dev, "status buf queue --> %d\n", value);
1301 /*-------------------------------------------------------------------------*/
1303 static void eth_setup_complete (struct usb_ep *ep, struct usb_request *req)
1305 if (req->status || req->actual != req->length)
1306 DEBUG ((struct eth_dev *) ep->driver_data,
1307 "setup complete --> %d, %d/%d\n",
1308 req->status, req->actual, req->length);
1311 #ifdef CONFIG_USB_ETH_RNDIS
1313 static void rndis_response_complete (struct usb_ep *ep, struct usb_request *req)
1315 if (req->status || req->actual != req->length)
1316 DEBUG ((struct eth_dev *) ep->driver_data,
1317 "rndis response complete --> %d, %d/%d\n",
1318 req->status, req->actual, req->length);
1320 /* done sending after USB_CDC_GET_ENCAPSULATED_RESPONSE */
1323 static void rndis_command_complete (struct usb_ep *ep, struct usb_request *req)
1325 struct eth_dev *dev = ep->driver_data;
1328 /* received RNDIS command from USB_CDC_SEND_ENCAPSULATED_COMMAND */
1329 spin_lock(&dev->lock);
1330 status = rndis_msg_parser (dev->rndis_config, (u8 *) req->buf);
1332 ERROR(dev, "%s: rndis parse error %d\n", __FUNCTION__, status);
1333 spin_unlock(&dev->lock);
1339 * The setup() callback implements all the ep0 functionality that's not
1340 * handled lower down. CDC has a number of less-common features:
1342 * - two interfaces: control, and ethernet data
1343 * - Ethernet data interface has two altsettings: default, and active
1344 * - class-specific descriptors for the control interface
1345 * - class-specific control requests
1348 eth_setup (struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl)
1350 struct eth_dev *dev = get_gadget_data (gadget);
1351 struct usb_request *req = dev->req;
1352 int value = -EOPNOTSUPP;
1353 u16 wIndex = le16_to_cpu(ctrl->wIndex);
1354 u16 wValue = le16_to_cpu(ctrl->wValue);
1355 u16 wLength = le16_to_cpu(ctrl->wLength);
1357 /* descriptors just go into the pre-allocated ep0 buffer,
1358 * while config change events may enable network traffic.
1360 req->complete = eth_setup_complete;
1361 switch (ctrl->bRequest) {
1363 case USB_REQ_GET_DESCRIPTOR:
1364 if (ctrl->bRequestType != USB_DIR_IN)
1366 switch (wValue >> 8) {
1369 value = min (wLength, (u16) sizeof device_desc);
1370 memcpy (req->buf, &device_desc, value);
1372 case USB_DT_DEVICE_QUALIFIER:
1373 if (!gadget_is_dualspeed(gadget))
1375 value = min (wLength, (u16) sizeof dev_qualifier);
1376 memcpy (req->buf, &dev_qualifier, value);
1379 case USB_DT_OTHER_SPEED_CONFIG:
1380 if (!gadget_is_dualspeed(gadget))
1384 value = config_buf(gadget, req->buf,
1387 gadget_is_otg(gadget));
1389 value = min (wLength, (u16) value);
1393 value = usb_gadget_get_string (&stringtab,
1394 wValue & 0xff, req->buf);
1396 value = min (wLength, (u16) value);
1401 case USB_REQ_SET_CONFIGURATION:
1402 if (ctrl->bRequestType != 0)
1404 if (gadget->a_hnp_support)
1405 DEBUG (dev, "HNP available\n");
1406 else if (gadget->a_alt_hnp_support)
1407 DEBUG (dev, "HNP needs a different root port\n");
1408 spin_lock (&dev->lock);
1409 value = eth_set_config (dev, wValue, GFP_ATOMIC);
1410 spin_unlock (&dev->lock);
1412 case USB_REQ_GET_CONFIGURATION:
1413 if (ctrl->bRequestType != USB_DIR_IN)
1415 *(u8 *)req->buf = dev->config;
1416 value = min (wLength, (u16) 1);
1419 case USB_REQ_SET_INTERFACE:
1420 if (ctrl->bRequestType != USB_RECIP_INTERFACE
1424 if (!cdc_active(dev) && wIndex != 0)
1426 spin_lock (&dev->lock);
1428 /* PXA hardware partially handles SET_INTERFACE;
1429 * we need to kluge around that interference.
1431 if (gadget_is_pxa (gadget)) {
1432 value = eth_set_config (dev, DEV_CONFIG_VALUE,
1437 #ifdef DEV_CONFIG_CDC
1439 case 0: /* control/master intf */
1443 usb_ep_disable (dev->status_ep);
1444 usb_ep_enable (dev->status_ep, dev->status);
1448 case 1: /* data intf */
1451 usb_ep_disable (dev->in_ep);
1452 usb_ep_disable (dev->out_ep);
1454 /* CDC requires the data transfers not be done from
1455 * the default interface setting ... also, setting
1456 * the non-default interface resets filters etc.
1459 if (!cdc_active (dev))
1461 usb_ep_enable (dev->in_ep, dev->in);
1462 usb_ep_enable (dev->out_ep, dev->out);
1463 dev->cdc_filter = DEFAULT_FILTER;
1464 netif_carrier_on (dev->net);
1466 issue_start_status (dev);
1467 if (netif_running (dev->net)) {
1468 spin_unlock (&dev->lock);
1469 eth_start (dev, GFP_ATOMIC);
1470 spin_lock (&dev->lock);
1473 netif_stop_queue (dev->net);
1474 netif_carrier_off (dev->net);
1480 /* FIXME this is wrong, as is the assumption that
1481 * all non-PXA hardware talks real CDC ...
1483 dev_warn (&gadget->dev, "set_interface ignored!\n");
1484 #endif /* DEV_CONFIG_CDC */
1487 spin_unlock (&dev->lock);
1489 case USB_REQ_GET_INTERFACE:
1490 if (ctrl->bRequestType != (USB_DIR_IN|USB_RECIP_INTERFACE)
1494 if (!(cdc_active(dev) || rndis_active(dev)) && wIndex != 0)
1497 /* for CDC, iff carrier is on, data interface is active. */
1498 if (rndis_active(dev) || wIndex != 1)
1499 *(u8 *)req->buf = 0;
1501 *(u8 *)req->buf = netif_carrier_ok (dev->net) ? 1 : 0;
1502 value = min (wLength, (u16) 1);
1505 #ifdef DEV_CONFIG_CDC
1506 case USB_CDC_SET_ETHERNET_PACKET_FILTER:
1507 /* see 6.2.30: no data, wIndex = interface,
1508 * wValue = packet filter bitmap
1510 if (ctrl->bRequestType != (USB_TYPE_CLASS|USB_RECIP_INTERFACE)
1515 DEBUG (dev, "packet filter %02x\n", wValue);
1516 dev->cdc_filter = wValue;
1521 * case USB_CDC_SET_ETHERNET_MULTICAST_FILTERS:
1522 * case USB_CDC_SET_ETHERNET_PM_PATTERN_FILTER:
1523 * case USB_CDC_GET_ETHERNET_PM_PATTERN_FILTER:
1524 * case USB_CDC_GET_ETHERNET_STATISTIC:
1527 #endif /* DEV_CONFIG_CDC */
1529 #ifdef CONFIG_USB_ETH_RNDIS
1530 /* RNDIS uses the CDC command encapsulation mechanism to implement
1531 * an RPC scheme, with much getting/setting of attributes by OID.
1533 case USB_CDC_SEND_ENCAPSULATED_COMMAND:
1534 if (ctrl->bRequestType != (USB_TYPE_CLASS|USB_RECIP_INTERFACE)
1535 || !rndis_active(dev)
1536 || wLength > USB_BUFSIZ
1538 || rndis_control_intf.bInterfaceNumber
1541 /* read the request, then process it */
1543 req->complete = rndis_command_complete;
1544 /* later, rndis_control_ack () sends a notification */
1547 case USB_CDC_GET_ENCAPSULATED_RESPONSE:
1548 if ((USB_DIR_IN|USB_TYPE_CLASS|USB_RECIP_INTERFACE)
1549 == ctrl->bRequestType
1550 && rndis_active(dev)
1551 // && wLength >= 0x0400
1553 && rndis_control_intf.bInterfaceNumber
1558 /* return the result */
1559 buf = rndis_get_next_response(dev->rndis_config, &n);
1561 memcpy(req->buf, buf, n);
1562 req->complete = rndis_response_complete;
1563 rndis_free_response(dev->rndis_config, buf);
1565 /* else stalls ... spec says to avoid that */
1572 "unknown control req%02x.%02x v%04x i%04x l%d\n",
1573 ctrl->bRequestType, ctrl->bRequest,
1574 wValue, wIndex, wLength);
1577 /* respond with data transfer before status phase? */
1579 req->length = value;
1580 req->zero = value < wLength
1581 && (value % gadget->ep0->maxpacket) == 0;
1582 value = usb_ep_queue (gadget->ep0, req, GFP_ATOMIC);
1584 DEBUG (dev, "ep_queue --> %d\n", value);
1586 eth_setup_complete (gadget->ep0, req);
1590 /* host either stalls (value < 0) or reports success */
1595 eth_disconnect (struct usb_gadget *gadget)
1597 struct eth_dev *dev = get_gadget_data (gadget);
1598 unsigned long flags;
1600 spin_lock_irqsave (&dev->lock, flags);
1601 netif_stop_queue (dev->net);
1602 netif_carrier_off (dev->net);
1603 eth_reset_config (dev);
1604 spin_unlock_irqrestore (&dev->lock, flags);
1606 /* FIXME RNDIS should enter RNDIS_UNINITIALIZED */
1608 /* next we may get setup() calls to enumerate new connections;
1609 * or an unbind() during shutdown (including removing module).
1613 /*-------------------------------------------------------------------------*/
1615 /* NETWORK DRIVER HOOKUP (to the layer above this driver) */
1617 static int eth_change_mtu (struct net_device *net, int new_mtu)
1619 struct eth_dev *dev = netdev_priv(net);
1624 if (new_mtu <= ETH_HLEN || new_mtu > ETH_FRAME_LEN)
1626 /* no zero-length packet read wanted after mtu-sized packets */
1627 if (((new_mtu + sizeof (struct ethhdr)) % dev->in_ep->maxpacket) == 0)
1633 static struct net_device_stats *eth_get_stats (struct net_device *net)
1635 return &((struct eth_dev *)netdev_priv(net))->stats;
1638 static void eth_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *p)
1640 struct eth_dev *dev = netdev_priv(net);
1641 strlcpy(p->driver, shortname, sizeof p->driver);
1642 strlcpy(p->version, DRIVER_VERSION, sizeof p->version);
1643 strlcpy(p->fw_version, dev->gadget->name, sizeof p->fw_version);
1644 strlcpy (p->bus_info, dev->gadget->dev.bus_id, sizeof p->bus_info);
1647 static u32 eth_get_link(struct net_device *net)
1649 struct eth_dev *dev = netdev_priv(net);
1650 return dev->gadget->speed != USB_SPEED_UNKNOWN;
1653 static struct ethtool_ops ops = {
1654 .get_drvinfo = eth_get_drvinfo,
1655 .get_link = eth_get_link
1658 static void defer_kevent (struct eth_dev *dev, int flag)
1660 if (test_and_set_bit (flag, &dev->todo))
1662 if (!schedule_work (&dev->work))
1663 ERROR (dev, "kevent %d may have been dropped\n", flag);
1665 DEBUG (dev, "kevent %d scheduled\n", flag);
1668 static void rx_complete (struct usb_ep *ep, struct usb_request *req);
1671 rx_submit (struct eth_dev *dev, struct usb_request *req, gfp_t gfp_flags)
1673 struct sk_buff *skb;
1674 int retval = -ENOMEM;
1677 /* Padding up to RX_EXTRA handles minor disagreements with host.
1678 * Normally we use the USB "terminate on short read" convention;
1679 * so allow up to (N*maxpacket), since that memory is normally
1680 * already allocated. Some hardware doesn't deal well with short
1681 * reads (e.g. DMA must be N*maxpacket), so for now don't trim a
1682 * byte off the end (to force hardware errors on overflow).
1684 * RNDIS uses internal framing, and explicitly allows senders to
1685 * pad to end-of-packet. That's potentially nice for speed,
1686 * but means receivers can't recover synch on their own.
1688 size = (sizeof (struct ethhdr) + dev->net->mtu + RX_EXTRA);
1689 size += dev->out_ep->maxpacket - 1;
1690 if (rndis_active(dev))
1691 size += sizeof (struct rndis_packet_msg_type);
1692 size -= size % dev->out_ep->maxpacket;
1694 skb = alloc_skb(size + NET_IP_ALIGN, gfp_flags);
1696 DEBUG (dev, "no rx skb\n");
1700 /* Some platforms perform better when IP packets are aligned,
1701 * but on at least one, checksumming fails otherwise. Note:
1702 * RNDIS headers involve variable numbers of LE32 values.
1704 skb_reserve(skb, NET_IP_ALIGN);
1706 req->buf = skb->data;
1708 req->complete = rx_complete;
1711 retval = usb_ep_queue (dev->out_ep, req, gfp_flags);
1712 if (retval == -ENOMEM)
1714 defer_kevent (dev, WORK_RX_MEMORY);
1716 DEBUG (dev, "rx submit --> %d\n", retval);
1718 dev_kfree_skb_any(skb);
1719 spin_lock(&dev->req_lock);
1720 list_add (&req->list, &dev->rx_reqs);
1721 spin_unlock(&dev->req_lock);
1726 static void rx_complete (struct usb_ep *ep, struct usb_request *req)
1728 struct sk_buff *skb = req->context;
1729 struct eth_dev *dev = ep->driver_data;
1730 int status = req->status;
1734 /* normal completion */
1736 skb_put (skb, req->actual);
1737 /* we know MaxPacketsPerTransfer == 1 here */
1738 if (rndis_active(dev))
1739 status = rndis_rm_hdr (skb);
1741 || ETH_HLEN > skb->len
1742 || skb->len > ETH_FRAME_LEN) {
1743 dev->stats.rx_errors++;
1744 dev->stats.rx_length_errors++;
1745 DEBUG (dev, "rx length %d\n", skb->len);
1749 skb->protocol = eth_type_trans (skb, dev->net);
1750 dev->stats.rx_packets++;
1751 dev->stats.rx_bytes += skb->len;
1753 /* no buffer copies needed, unless hardware can't
1756 status = netif_rx (skb);
1760 /* software-driven interface shutdown */
1761 case -ECONNRESET: // unlink
1762 case -ESHUTDOWN: // disconnect etc
1763 VDEBUG (dev, "rx shutdown, code %d\n", status);
1766 /* for hardware automagic (such as pxa) */
1767 case -ECONNABORTED: // endpoint reset
1768 DEBUG (dev, "rx %s reset\n", ep->name);
1769 defer_kevent (dev, WORK_RX_MEMORY);
1771 dev_kfree_skb_any (skb);
1776 dev->stats.rx_over_errors++;
1780 dev->stats.rx_errors++;
1781 DEBUG (dev, "rx status %d\n", status);
1786 dev_kfree_skb_any (skb);
1787 if (!netif_running (dev->net)) {
1789 spin_lock(&dev->req_lock);
1790 list_add (&req->list, &dev->rx_reqs);
1791 spin_unlock(&dev->req_lock);
1795 rx_submit (dev, req, GFP_ATOMIC);
1798 static int prealloc (struct list_head *list, struct usb_ep *ep,
1799 unsigned n, gfp_t gfp_flags)
1802 struct usb_request *req;
1807 /* queue/recycle up to N requests */
1809 list_for_each_entry (req, list, list) {
1814 req = usb_ep_alloc_request (ep, gfp_flags);
1816 return list_empty (list) ? -ENOMEM : 0;
1817 list_add (&req->list, list);
1824 struct list_head *next;
1826 next = req->list.next;
1827 list_del (&req->list);
1828 usb_ep_free_request (ep, req);
1833 req = container_of (next, struct usb_request, list);
1838 static int alloc_requests (struct eth_dev *dev, unsigned n, gfp_t gfp_flags)
1842 spin_lock(&dev->req_lock);
1843 status = prealloc (&dev->tx_reqs, dev->in_ep, n, gfp_flags);
1846 status = prealloc (&dev->rx_reqs, dev->out_ep, n, gfp_flags);
1851 DEBUG (dev, "can't alloc requests\n");
1853 spin_unlock(&dev->req_lock);
1857 static void rx_fill (struct eth_dev *dev, gfp_t gfp_flags)
1859 struct usb_request *req;
1860 unsigned long flags;
1862 /* fill unused rxq slots with some skb */
1863 spin_lock_irqsave(&dev->req_lock, flags);
1864 while (!list_empty (&dev->rx_reqs)) {
1865 req = container_of (dev->rx_reqs.next,
1866 struct usb_request, list);
1867 list_del_init (&req->list);
1868 spin_unlock_irqrestore(&dev->req_lock, flags);
1870 if (rx_submit (dev, req, gfp_flags) < 0) {
1871 defer_kevent (dev, WORK_RX_MEMORY);
1875 spin_lock_irqsave(&dev->req_lock, flags);
1877 spin_unlock_irqrestore(&dev->req_lock, flags);
1880 static void eth_work (struct work_struct *work)
1882 struct eth_dev *dev = container_of(work, struct eth_dev, work);
1884 if (test_and_clear_bit (WORK_RX_MEMORY, &dev->todo)) {
1885 if (netif_running (dev->net))
1886 rx_fill (dev, GFP_KERNEL);
1890 DEBUG (dev, "work done, flags = 0x%lx\n", dev->todo);
1893 static void tx_complete (struct usb_ep *ep, struct usb_request *req)
1895 struct sk_buff *skb = req->context;
1896 struct eth_dev *dev = ep->driver_data;
1898 switch (req->status) {
1900 dev->stats.tx_errors++;
1901 VDEBUG (dev, "tx err %d\n", req->status);
1903 case -ECONNRESET: // unlink
1904 case -ESHUTDOWN: // disconnect etc
1907 dev->stats.tx_bytes += skb->len;
1909 dev->stats.tx_packets++;
1911 spin_lock(&dev->req_lock);
1912 list_add (&req->list, &dev->tx_reqs);
1913 spin_unlock(&dev->req_lock);
1914 dev_kfree_skb_any (skb);
1916 atomic_dec (&dev->tx_qlen);
1917 if (netif_carrier_ok (dev->net))
1918 netif_wake_queue (dev->net);
1921 static inline int eth_is_promisc (struct eth_dev *dev)
1923 /* no filters for the CDC subset; always promisc */
1924 if (subset_active (dev))
1926 return dev->cdc_filter & USB_CDC_PACKET_TYPE_PROMISCUOUS;
1929 static int eth_start_xmit (struct sk_buff *skb, struct net_device *net)
1931 struct eth_dev *dev = netdev_priv(net);
1932 int length = skb->len;
1934 struct usb_request *req = NULL;
1935 unsigned long flags;
1937 /* apply outgoing CDC or RNDIS filters */
1938 if (!eth_is_promisc (dev)) {
1939 u8 *dest = skb->data;
1941 if (is_multicast_ether_addr(dest)) {
1944 /* ignores USB_CDC_PACKET_TYPE_MULTICAST and host
1945 * SET_ETHERNET_MULTICAST_FILTERS requests
1947 if (is_broadcast_ether_addr(dest))
1948 type = USB_CDC_PACKET_TYPE_BROADCAST;
1950 type = USB_CDC_PACKET_TYPE_ALL_MULTICAST;
1951 if (!(dev->cdc_filter & type)) {
1952 dev_kfree_skb_any (skb);
1956 /* ignores USB_CDC_PACKET_TYPE_DIRECTED */
1959 spin_lock_irqsave(&dev->req_lock, flags);
1961 * this freelist can be empty if an interrupt triggered disconnect()
1962 * and reconfigured the gadget (shutting down this queue) after the
1963 * network stack decided to xmit but before we got the spinlock.
1965 if (list_empty(&dev->tx_reqs)) {
1966 spin_unlock_irqrestore(&dev->req_lock, flags);
1970 req = container_of (dev->tx_reqs.next, struct usb_request, list);
1971 list_del (&req->list);
1973 /* temporarily stop TX queue when the freelist empties */
1974 if (list_empty (&dev->tx_reqs))
1975 netif_stop_queue (net);
1976 spin_unlock_irqrestore(&dev->req_lock, flags);
1978 /* no buffer copies needed, unless the network stack did it
1979 * or the hardware can't use skb buffers.
1980 * or there's not enough space for any RNDIS headers we need
1982 if (rndis_active(dev)) {
1983 struct sk_buff *skb_rndis;
1985 skb_rndis = skb_realloc_headroom (skb,
1986 sizeof (struct rndis_packet_msg_type));
1990 dev_kfree_skb_any (skb);
1992 rndis_add_hdr (skb);
1995 req->buf = skb->data;
1997 req->complete = tx_complete;
1999 /* use zlp framing on tx for strict CDC-Ether conformance,
2000 * though any robust network rx path ignores extra padding.
2001 * and some hardware doesn't like to write zlps.
2004 if (!dev->zlp && (length % dev->in_ep->maxpacket) == 0)
2007 req->length = length;
2009 /* throttle highspeed IRQ rate back slightly */
2010 if (gadget_is_dualspeed(dev->gadget))
2011 req->no_interrupt = (dev->gadget->speed == USB_SPEED_HIGH)
2012 ? ((atomic_read(&dev->tx_qlen) % qmult) != 0)
2015 retval = usb_ep_queue (dev->in_ep, req, GFP_ATOMIC);
2018 DEBUG (dev, "tx queue err %d\n", retval);
2021 net->trans_start = jiffies;
2022 atomic_inc (&dev->tx_qlen);
2027 dev->stats.tx_dropped++;
2028 dev_kfree_skb_any (skb);
2029 spin_lock_irqsave(&dev->req_lock, flags);
2030 if (list_empty (&dev->tx_reqs))
2031 netif_start_queue (net);
2032 list_add (&req->list, &dev->tx_reqs);
2033 spin_unlock_irqrestore(&dev->req_lock, flags);
2038 /*-------------------------------------------------------------------------*/
2040 #ifdef CONFIG_USB_ETH_RNDIS
2042 /* The interrupt endpoint is used in RNDIS to notify the host when messages
2043 * other than data packets are available ... notably the REMOTE_NDIS_*_CMPLT
2044 * messages, but also REMOTE_NDIS_INDICATE_STATUS_MSG and potentially even
2045 * REMOTE_NDIS_KEEPALIVE_MSG.
2047 * The RNDIS control queue is processed by GET_ENCAPSULATED_RESPONSE, and
2048 * normally just one notification will be queued.
2051 static struct usb_request *eth_req_alloc (struct usb_ep *, unsigned, gfp_t);
2052 static void eth_req_free (struct usb_ep *ep, struct usb_request *req);
2055 rndis_control_ack_complete (struct usb_ep *ep, struct usb_request *req)
2057 struct eth_dev *dev = ep->driver_data;
2059 if (req->status || req->actual != req->length)
2061 "rndis control ack complete --> %d, %d/%d\n",
2062 req->status, req->actual, req->length);
2063 req->context = NULL;
2065 if (req != dev->stat_req)
2066 eth_req_free(ep, req);
2069 static int rndis_control_ack (struct net_device *net)
2071 struct eth_dev *dev = netdev_priv(net);
2073 struct usb_request *resp = dev->stat_req;
2075 /* in case RNDIS calls this after disconnect */
2077 DEBUG (dev, "status ENODEV\n");
2081 /* in case queue length > 1 */
2082 if (resp->context) {
2083 resp = eth_req_alloc (dev->status_ep, 8, GFP_ATOMIC);
2088 /* Send RNDIS RESPONSE_AVAILABLE notification;
2089 * USB_CDC_NOTIFY_RESPONSE_AVAILABLE should work too
2092 resp->complete = rndis_control_ack_complete;
2093 resp->context = dev;
2095 *((__le32 *) resp->buf) = __constant_cpu_to_le32 (1);
2096 *((__le32 *) resp->buf + 1) = __constant_cpu_to_le32 (0);
2098 length = usb_ep_queue (dev->status_ep, resp, GFP_ATOMIC);
2101 rndis_control_ack_complete (dev->status_ep, resp);
2109 #define rndis_control_ack NULL
2113 static void eth_start (struct eth_dev *dev, gfp_t gfp_flags)
2115 DEBUG (dev, "%s\n", __FUNCTION__);
2117 /* fill the rx queue */
2118 rx_fill (dev, gfp_flags);
2120 /* and open the tx floodgates */
2121 atomic_set (&dev->tx_qlen, 0);
2122 netif_wake_queue (dev->net);
2123 if (rndis_active(dev)) {
2124 rndis_set_param_medium (dev->rndis_config,
2126 BITRATE(dev->gadget)/100);
2127 (void) rndis_signal_connect (dev->rndis_config);
2131 static int eth_open (struct net_device *net)
2133 struct eth_dev *dev = netdev_priv(net);
2135 DEBUG (dev, "%s\n", __FUNCTION__);
2136 if (netif_carrier_ok (dev->net))
2137 eth_start (dev, GFP_KERNEL);
2141 static int eth_stop (struct net_device *net)
2143 struct eth_dev *dev = netdev_priv(net);
2145 VDEBUG (dev, "%s\n", __FUNCTION__);
2146 netif_stop_queue (net);
2148 DEBUG (dev, "stop stats: rx/tx %ld/%ld, errs %ld/%ld\n",
2149 dev->stats.rx_packets, dev->stats.tx_packets,
2150 dev->stats.rx_errors, dev->stats.tx_errors
2153 /* ensure there are no more active requests */
2155 usb_ep_disable (dev->in_ep);
2156 usb_ep_disable (dev->out_ep);
2157 if (netif_carrier_ok (dev->net)) {
2158 DEBUG (dev, "host still using in/out endpoints\n");
2159 // FIXME idiom may leave toggle wrong here
2160 usb_ep_enable (dev->in_ep, dev->in);
2161 usb_ep_enable (dev->out_ep, dev->out);
2163 if (dev->status_ep) {
2164 usb_ep_disable (dev->status_ep);
2165 usb_ep_enable (dev->status_ep, dev->status);
2169 if (rndis_active(dev)) {
2170 rndis_set_param_medium(dev->rndis_config, NDIS_MEDIUM_802_3, 0);
2171 (void) rndis_signal_disconnect (dev->rndis_config);
2177 /*-------------------------------------------------------------------------*/
2179 static struct usb_request *
2180 eth_req_alloc (struct usb_ep *ep, unsigned size, gfp_t gfp_flags)
2182 struct usb_request *req;
2184 req = usb_ep_alloc_request (ep, gfp_flags);
2188 req->buf = kmalloc (size, gfp_flags);
2190 usb_ep_free_request (ep, req);
2197 eth_req_free (struct usb_ep *ep, struct usb_request *req)
2200 usb_ep_free_request (ep, req);
2204 static void /* __init_or_exit */
2205 eth_unbind (struct usb_gadget *gadget)
2207 struct eth_dev *dev = get_gadget_data (gadget);
2209 DEBUG (dev, "unbind\n");
2210 rndis_deregister (dev->rndis_config);
2213 /* we've already been disconnected ... no i/o is active */
2215 eth_req_free (gadget->ep0, dev->req);
2218 if (dev->stat_req) {
2219 eth_req_free (dev->status_ep, dev->stat_req);
2220 dev->stat_req = NULL;
2223 unregister_netdev (dev->net);
2224 free_netdev(dev->net);
2226 /* assuming we used keventd, it must quiesce too */
2227 flush_scheduled_work ();
2228 set_gadget_data (gadget, NULL);
2231 static u8 __devinit nibble (unsigned char c)
2233 if (likely (isdigit (c)))
2236 if (likely (isxdigit (c)))
2237 return 10 + c - 'A';
2241 static int __devinit get_ether_addr(const char *str, u8 *dev_addr)
2246 for (i = 0; i < 6; i++) {
2249 if((*str == '.') || (*str == ':'))
2251 num = nibble(*str++) << 4;
2252 num |= (nibble(*str++));
2255 if (is_valid_ether_addr (dev_addr))
2258 random_ether_addr(dev_addr);
2262 static int __devinit
2263 eth_bind (struct usb_gadget *gadget)
2265 struct eth_dev *dev;
2266 struct net_device *net;
2267 u8 cdc = 1, zlp = 1, rndis = 1;
2268 struct usb_ep *in_ep, *out_ep, *status_ep = NULL;
2269 int status = -ENOMEM;
2272 /* these flags are only ever cleared; compiler take note */
2273 #ifndef DEV_CONFIG_CDC
2276 #ifndef CONFIG_USB_ETH_RNDIS
2280 /* Because most host side USB stacks handle CDC Ethernet, that
2281 * standard protocol is _strongly_ preferred for interop purposes.
2282 * (By everyone except Microsoft.)
2284 if (gadget_is_pxa (gadget)) {
2285 /* pxa doesn't support altsettings */
2287 } else if (gadget_is_musbhdrc(gadget)) {
2288 /* reduce tx dma overhead by avoiding special cases */
2290 } else if (gadget_is_sh(gadget)) {
2291 /* sh doesn't support multiple interfaces or configs */
2294 } else if (gadget_is_sa1100 (gadget)) {
2295 /* hardware can't write zlps */
2297 /* sa1100 CAN do CDC, without status endpoint ... we use
2298 * non-CDC to be compatible with ARM Linux-2.4 "usb-eth".
2303 gcnum = usb_gadget_controller_number (gadget);
2305 device_desc.bcdDevice = cpu_to_le16 (0x0200 + gcnum);
2307 /* can't assume CDC works. don't want to default to
2308 * anything less functional on CDC-capable hardware,
2309 * so we fail in this case.
2311 dev_err (&gadget->dev,
2312 "controller '%s' not recognized\n",
2316 snprintf (manufacturer, sizeof manufacturer, "%s %s/%s",
2317 init_utsname()->sysname, init_utsname()->release,
2320 /* If there's an RNDIS configuration, that's what Windows wants to
2321 * be using ... so use these product IDs here and in the "linux.inf"
2322 * needed to install MSFT drivers. Current Linux kernels will use
2323 * the second configuration if it's CDC Ethernet, and need some help
2324 * to choose the right configuration otherwise.
2327 device_desc.idVendor =
2328 __constant_cpu_to_le16(RNDIS_VENDOR_NUM);
2329 device_desc.idProduct =
2330 __constant_cpu_to_le16(RNDIS_PRODUCT_NUM);
2331 snprintf (product_desc, sizeof product_desc,
2332 "RNDIS/%s", driver_desc);
2334 /* CDC subset ... recognized by Linux since 2.4.10, but Windows
2335 * drivers aren't widely available. (That may be improved by
2336 * supporting one submode of the "SAFE" variant of MDLM.)
2339 device_desc.idVendor =
2340 __constant_cpu_to_le16(SIMPLE_VENDOR_NUM);
2341 device_desc.idProduct =
2342 __constant_cpu_to_le16(SIMPLE_PRODUCT_NUM);
2345 /* support optional vendor/distro customization */
2348 dev_err (&gadget->dev, "idVendor needs idProduct!\n");
2351 device_desc.idVendor = cpu_to_le16(idVendor);
2352 device_desc.idProduct = cpu_to_le16(idProduct);
2354 device_desc.bcdDevice = cpu_to_le16(bcdDevice);
2357 strlcpy (manufacturer, iManufacturer, sizeof manufacturer);
2359 strlcpy (product_desc, iProduct, sizeof product_desc);
2360 if (iSerialNumber) {
2361 device_desc.iSerialNumber = STRING_SERIALNUMBER,
2362 strlcpy(serial_number, iSerialNumber, sizeof serial_number);
2365 /* all we really need is bulk IN/OUT */
2366 usb_ep_autoconfig_reset (gadget);
2367 in_ep = usb_ep_autoconfig (gadget, &fs_source_desc);
2370 dev_err (&gadget->dev,
2371 "can't autoconfigure on %s\n",
2375 in_ep->driver_data = in_ep; /* claim */
2377 out_ep = usb_ep_autoconfig (gadget, &fs_sink_desc);
2380 out_ep->driver_data = out_ep; /* claim */
2382 #if defined(DEV_CONFIG_CDC) || defined(CONFIG_USB_ETH_RNDIS)
2383 /* CDC Ethernet control interface doesn't require a status endpoint.
2384 * Since some hosts expect one, try to allocate one anyway.
2387 status_ep = usb_ep_autoconfig (gadget, &fs_status_desc);
2389 status_ep->driver_data = status_ep; /* claim */
2391 dev_err (&gadget->dev,
2392 "can't run RNDIS on %s\n",
2395 #ifdef DEV_CONFIG_CDC
2396 /* pxa25x only does CDC subset; often used with RNDIS */
2398 control_intf.bNumEndpoints = 0;
2399 /* FIXME remove endpoint from descriptor list */
2405 /* one config: cdc, else minimal subset */
2407 eth_config.bNumInterfaces = 1;
2408 eth_config.iConfiguration = STRING_SUBSET;
2410 /* use functions to set these up, in case we're built to work
2411 * with multiple controllers and must override CDC Ethernet.
2413 fs_subset_descriptors();
2414 hs_subset_descriptors();
2417 device_desc.bMaxPacketSize0 = gadget->ep0->maxpacket;
2418 usb_gadget_set_selfpowered (gadget);
2420 /* For now RNDIS is always a second config */
2422 device_desc.bNumConfigurations = 2;
2424 if (gadget_is_dualspeed(gadget)) {
2426 dev_qualifier.bNumConfigurations = 2;
2428 dev_qualifier.bDeviceClass = USB_CLASS_VENDOR_SPEC;
2430 /* assumes ep0 uses the same value for both speeds ... */
2431 dev_qualifier.bMaxPacketSize0 = device_desc.bMaxPacketSize0;
2433 /* and that all endpoints are dual-speed */
2434 hs_source_desc.bEndpointAddress =
2435 fs_source_desc.bEndpointAddress;
2436 hs_sink_desc.bEndpointAddress =
2437 fs_sink_desc.bEndpointAddress;
2438 #if defined(DEV_CONFIG_CDC) || defined(CONFIG_USB_ETH_RNDIS)
2440 hs_status_desc.bEndpointAddress =
2441 fs_status_desc.bEndpointAddress;
2445 if (gadget_is_otg(gadget)) {
2446 otg_descriptor.bmAttributes |= USB_OTG_HNP,
2447 eth_config.bmAttributes |= USB_CONFIG_ATT_WAKEUP;
2448 eth_config.bMaxPower = 4;
2449 #ifdef CONFIG_USB_ETH_RNDIS
2450 rndis_config.bmAttributes |= USB_CONFIG_ATT_WAKEUP;
2451 rndis_config.bMaxPower = 4;
2455 net = alloc_etherdev (sizeof *dev);
2458 dev = netdev_priv(net);
2459 spin_lock_init (&dev->lock);
2460 spin_lock_init (&dev->req_lock);
2461 INIT_WORK (&dev->work, eth_work);
2462 INIT_LIST_HEAD (&dev->tx_reqs);
2463 INIT_LIST_HEAD (&dev->rx_reqs);
2465 /* network device setup */
2467 strcpy (net->name, "usb%d");
2472 dev->out_ep = out_ep;
2473 dev->status_ep = status_ep;
2475 /* Module params for these addresses should come from ID proms.
2476 * The host side address is used with CDC and RNDIS, and commonly
2477 * ends up in a persistent config database. It's not clear if
2478 * host side code for the SAFE thing cares -- its original BLAN
2479 * thing didn't, Sharp never assigned those addresses on Zaurii.
2481 if (get_ether_addr(dev_addr, net->dev_addr))
2482 dev_warn(&gadget->dev,
2483 "using random %s ethernet address\n", "self");
2484 if (get_ether_addr(host_addr, dev->host_mac))
2485 dev_warn(&gadget->dev,
2486 "using random %s ethernet address\n", "host");
2487 snprintf (ethaddr, sizeof ethaddr, "%02X%02X%02X%02X%02X%02X",
2488 dev->host_mac [0], dev->host_mac [1],
2489 dev->host_mac [2], dev->host_mac [3],
2490 dev->host_mac [4], dev->host_mac [5]);
2493 status = rndis_init();
2495 dev_err (&gadget->dev, "can't init RNDIS, %d\n",
2501 net->change_mtu = eth_change_mtu;
2502 net->get_stats = eth_get_stats;
2503 net->hard_start_xmit = eth_start_xmit;
2504 net->open = eth_open;
2505 net->stop = eth_stop;
2506 // watchdog_timeo, tx_timeout ...
2507 // set_multicast_list
2508 SET_ETHTOOL_OPS(net, &ops);
2510 /* preallocate control message data and buffer */
2511 dev->req = eth_req_alloc (gadget->ep0, USB_BUFSIZ, GFP_KERNEL);
2514 dev->req->complete = eth_setup_complete;
2516 /* ... and maybe likewise for status transfer */
2517 #if defined(DEV_CONFIG_CDC) || defined(CONFIG_USB_ETH_RNDIS)
2518 if (dev->status_ep) {
2519 dev->stat_req = eth_req_alloc (dev->status_ep,
2520 STATUS_BYTECOUNT, GFP_KERNEL);
2521 if (!dev->stat_req) {
2522 eth_req_free (gadget->ep0, dev->req);
2525 dev->stat_req->context = NULL;
2529 /* finish hookup to lower layer ... */
2530 dev->gadget = gadget;
2531 set_gadget_data (gadget, dev);
2532 gadget->ep0->driver_data = dev;
2534 /* two kinds of host-initiated state changes:
2535 * - iff DATA transfer is active, carrier is "on"
2536 * - tx queueing enabled if open *and* carrier is "on"
2538 netif_stop_queue (dev->net);
2539 netif_carrier_off (dev->net);
2541 SET_NETDEV_DEV (dev->net, &gadget->dev);
2542 status = register_netdev (dev->net);
2546 INFO (dev, "%s, version: " DRIVER_VERSION "\n", driver_desc);
2547 INFO (dev, "using %s, OUT %s IN %s%s%s\n", gadget->name,
2548 out_ep->name, in_ep->name,
2549 status_ep ? " STATUS " : "",
2550 status_ep ? status_ep->name : ""
2552 INFO (dev, "MAC %02x:%02x:%02x:%02x:%02x:%02x\n",
2553 net->dev_addr [0], net->dev_addr [1],
2554 net->dev_addr [2], net->dev_addr [3],
2555 net->dev_addr [4], net->dev_addr [5]);
2558 INFO (dev, "HOST MAC %02x:%02x:%02x:%02x:%02x:%02x\n",
2559 dev->host_mac [0], dev->host_mac [1],
2560 dev->host_mac [2], dev->host_mac [3],
2561 dev->host_mac [4], dev->host_mac [5]);
2566 /* FIXME RNDIS vendor id == "vendor NIC code" == ? */
2568 dev->rndis_config = rndis_register (rndis_control_ack);
2569 if (dev->rndis_config < 0) {
2571 unregister_netdev (dev->net);
2576 /* these set up a lot of the OIDs that RNDIS needs */
2577 rndis_set_host_mac (dev->rndis_config, dev->host_mac);
2578 if (rndis_set_param_dev (dev->rndis_config, dev->net,
2579 &dev->stats, &dev->cdc_filter))
2581 if (rndis_set_param_vendor(dev->rndis_config, vendorID,
2584 if (rndis_set_param_medium(dev->rndis_config,
2585 NDIS_MEDIUM_802_3, 0))
2587 INFO (dev, "RNDIS ready\n");
2593 dev_dbg(&gadget->dev, "register_netdev failed, %d\n", status);
2595 eth_unbind (gadget);
2599 /*-------------------------------------------------------------------------*/
2602 eth_suspend (struct usb_gadget *gadget)
2604 struct eth_dev *dev = get_gadget_data (gadget);
2606 DEBUG (dev, "suspend\n");
2611 eth_resume (struct usb_gadget *gadget)
2613 struct eth_dev *dev = get_gadget_data (gadget);
2615 DEBUG (dev, "resume\n");
2619 /*-------------------------------------------------------------------------*/
2621 static struct usb_gadget_driver eth_driver = {
2624 .function = (char *) driver_desc,
2626 .unbind = eth_unbind,
2629 .disconnect = eth_disconnect,
2631 .suspend = eth_suspend,
2632 .resume = eth_resume,
2635 .name = (char *) shortname,
2636 .owner = THIS_MODULE,
2640 MODULE_DESCRIPTION (DRIVER_DESC);
2641 MODULE_AUTHOR ("David Brownell, Benedikt Spanger");
2642 MODULE_LICENSE ("GPL");
2645 static int __init init (void)
2647 return usb_gadget_register_driver (ð_driver);
2651 static void __exit cleanup (void)
2653 usb_gadget_unregister_driver (ð_driver);
2655 module_exit (cleanup);